Marine canvas comes in four broad families, and they genuinely suit different boats and different storage. The choice is not about which is best — it is about which compromise you want.
The four families
| Fabric | Type | Strengths | Trade-off |
|---|---|---|---|
| Sunbrella | Solution-dyed acrylic | Best-in-class UV resistance and colourfastness, breathable, carries a 10-year warranty against fading | Water-resistant rather than waterproof; depends on good design and upkeep |
| Top Gun | Coated polyester | Excellent abrasion resistance and strength, solid UV performance, friendlier price | Shorter service life in punishing sun, and coating quality varies widely by grade |
| Stamoid | Vinyl-coated | Maximum waterproofing of the four | Does not breathe, so trapped moisture underneath becomes the new problem |
| Seamark | Sunbrella base with a vinyl backing | Fully waterproof while matching Sunbrella colours; a common OE choice for bimini and camper tops | Costs more than either material it is made from |
Why solution-dyed matters
In a solution-dyed acrylic the colour is added to the fibre while it is still liquid, so it runs all the way through. In a coated or surface-dyed fabric the colour sits on top.
The difference is invisible in year one. By year three the coated fabric has gone chalky and faded while the acrylic still looks like itself. That is the entire argument for paying more up front.
The trade nobody can escape
Read the table again and the pattern is clear: waterproof and breathable work against each other. A fabric that lets no water in also lets no moisture out, so condensation collects underneath — on cushions, on the deck, and in any wood it can reach.
This is why the right answer depends far more on how the boat is stored than on the boat itself.
Choosing by how the boat lives
- In a slip, uncovered, in full sun — UV is the enemy. Acrylic.
- On a lift or mooring, exposed to rain — waterproofing matters more. Seamark or Stamoid, with ventilation designed in.
- On a trailer, stored dry — abrasion from towing is the biggest load. Coated polyester earns its keep here.
- Bimini or camper top you want to match existing canvas — Seamark exists precisely for this.
The parts that fail before the fabric
On most canvas we see, the fabric is not what failed. It is the thread, the zips or the hardware. Thread that is not rot-proof gives out at the seams while the panels are still sound, and it is the cheapest place for a shop to cut a corner because nobody can see it.
Bring a piece of your canvas by the shop in Monroe and we will tell you honestly whether it needs recovering, restitching, or replacing. See our marine upholstery page.